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A pilot study to determine the usefulness of a survey method for obtaining data on occupational disease was conducted among workers in selected small industries in Oregon and Washington. Over 1,100 medical conditions were found among 908 participants: probable occupational, 31 percent; probable nonoccupational, 45 percent; doubtful occupational or can't evaluate, 14 percent; and suggestive history, 10 percent. Of 346 cases of probable occupational disease, hearing loss was most frequent, 28 percent; then skin, 18; lower respiratory conditions, 14; toxic and low grade toxic effects and nonsymptomatic conditions (mainly elevated blood lead) (7439921), 14; upper respiratory conditions, 11 percent; and eye conditions, 9 percent. Anemia, diseases of the musculoskeletal and connective tissues and other conditions accounted for the remaining 6 percent. Of the 908 workers participating in the medical survey, 258 workers were found with 346 cases of probable occupational disease, for a prevalence rate of 28.4 per 100 workers. Occupational exposures were determined for all workers in the survey. Those known to have been exposed to poorly controlled hazards had a higher prevalence rate.